MemberListWindow Validator

WGneu/Utils.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+using System.Windows;
+
+namespace WGneu
+{
+    class Utils
+    {
+        public static IEnumerable<T> FindVisualChilds<T>(DependencyObject depObj) where T : DependencyObject
+        {
+            if (depObj == null)
+                yield return (T)Enumerable.Empty<T>();
+            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
+            {
+                DependencyObject ithChild = VisualTreeHelper.GetChild(depObj, i);
+                if (ithChild == null)
+                    continue;
+                if (ithChild is T t)
+                    yield return t;
+                foreach (T childOfChild in FindVisualChilds<T>(ithChild))
+                    yield return childOfChild;
+            }
+        }
+    }
+}